BY ROBERT STEVENS Associated PressLONDON — Sit at the back of the movie theater, and it's possible to see the appeal of ScreenX, the latest attempt to drag film lovers off the sofa and away from Netflix. Instead of one screen, there are three — one at the front, and two on the sides — to add to the immersive experience you can't get from the home TV. First adopted in South Korea in 2012, the system is being launched in the U.K.